Neduba radicata Cole, Weissman, & Lightfoot

Cole, Jeffrey A., Weissman, David B., Lightfoot, David C., Ueshima, Norihiro, Warchałowska-Śliwa, Elżbieta, Maryańska-Nadachowska, Anna & Chatfield-Taylor, Will, 2021, A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini), Zootaxa 4910 (1), pp. 1-92: 37-38

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Neduba radicata Cole, Weissman, & Lightfoot

sp. n.

Neduba radicata Cole, Weissman, & Lightfoot   , sp. n.

Fig. 9 View FIGURE 9 (distribution), Fig. 15 View FIGURE 15 (male and female habitus, calling song, male and female terminalia, karyotype), Plate 1D View PLATE 1 (live habitus), Plate 4F View PLATE 4 (male calling song), Plate 6K View PLATE 6 (male ventral sclerite), Plate 9G View PLATE 9 (male titillators), Plate 11F View PLATE 11 (female subgenital plate).

Common name. Lake Tahoe Shieldback.

History of recognition. Confused with N. convexa   , specimen from CA: El Dorado Co., Ice House Road, 22-X- 1965, D.C. Rentz, 1 male ( Rentz & Birchim 1968)   .

Type material. HOLOTYPE MALE: USA, CA, El Dorado Co., Stanford University Sierra Camp , Fallen Leaf Lake, 38.901076N, 120.061626W, 1940 m, 9-VII-1988, DB Weissman, CAS, S88-60 View Materials [stop], R88-75 A [recording], T88-8 [karyotype], genitalia extracted and cleared in vial and excised tegmen in gelcap below specimen, deposited in CAS, Entomology type #19679. GoogleMaps  

PARATYPES (n = 36): USA, CA, El Dorado Co., 8♁, 1♀, China Flat Campground, El Dorado National Forest , 2 mi. SE of Kyburz off   US50, 38.7535N, 120.2671W, 1470 m, 20-21-VII-2012, JA Cole GoogleMaps   , LACM; 1♁, same data except GoogleMaps   JAC; 4♁, same data except 12-VIII-2002, JA Cole GoogleMaps   , LACM; 1♁, same data GoogleMaps   JAC; 2♁, same data except 19-VII- 2015, JA Cole, DB Weissman GoogleMaps   , LACM; 1♁, Emerald Bay State Park, Lake Tahoe , 38.964888N, 120.090884W, 1890 m, 8-VII-2016, DI Weissman GoogleMaps   , CAS; 1♀ nymph, same data as holotype except 10-VII-1935, FE Blaisdell GoogleMaps   , CAS; 1♀ nymph, same data as holotype except 20-VII-1936, FE Blaisdell GoogleMaps   , CAS; 1♀, same data as holotype except 3-VIII- 1989, BI Weissman GoogleMaps   , CAS; 2♁, 2♀, same data as holotype except 9-VII-1988, DB Weissman GoogleMaps   , CAS; 1♁ nymph, same data as holotype except VII-1915 GoogleMaps   , LS Rosenbaum   , CAS; 1♀ nymph, same data as holotype except VII-1931, OH Swezey GoogleMaps   , CAS; 6♁, 1♀, Loon Lake , 38.997163N, 120.3095W, 1950 m, VIII-1991, BI Weissman GoogleMaps   , CAS; Placer Co., 1♁, Finning Mill Rd. at Forest Hill Rd. , 39.0586N, 120.7696W, 1097 m, 20-VII-2012, JA Cole GoogleMaps   , JAC; 1♁, Squaw Valley, foot trail by Squaw Creek , 39.21169N, 120.198611W, 1920 m, 1-VIII-1988, VF Lee GoogleMaps   , CAS.

Measurements. (mm, ♁n = 20, ♀ n = 4) Hind femur ♁18.00–20.91, ♀ 19.05–22.36, pronotum total length ♁8.70–10.16, ♀ 7.35–8.46, prozona length ♁3.38–4.36, ♀ 3.80–4.62, metazona dorsal length ♁4.82–6.47, ♀ 3.32– 4.66, pronotum constriction width ♁2.10–2.65, ♀ 2.55–2.87, metazona dorsal width ♁6.35–7.55, ♀ 5.28–5.62, head width ♁4.20–4.75, ♀ 4.50–5.22, ovipositor length ♀ 12.78–15.54.

Distribution. High elevations in the central and northern Sierra Nevada of California.

Habitat. Mixed conifer woodland. Taken from understory tangles and leaf litter in coniferous forest, under logs, in a small shrub in an open field, and from riverbanks. One male paratype sang from 2.4 m above ground in thicket of branches. He dropped to the ground when approached (JAC pers. obs.).

Seasonal occurrence. Midsummer through fall, from July (1-VII-1950, HL McKenzie, CSCA) through November (17-XI-1967, HR Ingham, CSCA). Nymphs occur from early June through August, thus overlapping broadly with adult activity.

Stridulatory file. (n = 6) length 3.3–3.9 mm, 115–135 teeth, tooth density 35.4 ± 3.4 (30.8–40.9) teeth/mm.

Song. (n = 19) PTR is significantly faster than all other Convexa Clade lineages (ANCOVA, P = 1.08×10 -5), owing to significantly shorter MPTL of 202.5 ± 53.6 ms (ANCOVA, P = 4.27×10 -11). MPT often have a characteristic amplitude modulation pattern, with a gradual increase in amplitude followed by an abrupt increase at the middle of the PT ( Plate 4F View PLATE 4 ). Males may sing in the late afternoon as well as at night.

Karyotype. (n = 7) 2n♁ = 26 (2m + 22t + XtYt), T88-8, S88-60, paratype.

Recognition. The male ventral sclerite has straight, thick shaft, the apex rounded with the highest point lateral to the central axis, and the short lateral process directed 45 o anterior to plane of shaft. This genital morphology may only be confused with N. diabolica   and some N. carinata   , both of which have higher stridulatory file tooth densities and lisping songs and are distributed in the South Coast Ranges. The female subgenital plate is distinct from all other Carinata Group species: wider than long with a strongly bifurcate apex. The song PTR is faster and MPTL shorter than all other Convexa Clade taxa. This species is the only Neduba   found in high elevation yellow pine forest in the central and northern Sierra Nevada Mountains of California.

Etymology. l. radicata   having roots, having found a home.

Notes. At China Flat Campground, El Dorado County, California, two males were observed emerging from leaf litter to sing in understory tangles.Acoustical activity commenced before dusk at this locality during overcast conditions after a rainstorm. At the southern extent of the range along Finning Mill Road, males were singing before sunset at 2019 h. This species is sympatric with N. radocantans   (Sierranus Group) in El Dorado County, California.

Specimens examined. (n = 21) All USA, CA   , El Dorado Co., in addition to type material (above), 1♁, Kelsey , 38.798791N, 120.820768W, 24-VII-1939, J Labadie, CSCA; 1♀ GoogleMaps   , Pollock Pines , 38.761292N, 120.586594W, 1207 m, 1-VII-1950, HL McKenzie, CSCA; 1♀ GoogleMaps   nymph, Snowline Camp , 38.746292N, 120.624373W, 21-VI-1948, CD MacNeill, CAS GoogleMaps   ; 1♁, Strawberry , 38.796852N, 120.145187W, 1768 m, 1-X-1954, ME Gardner, BMED; 1♀ GoogleMaps   , same data except WJ Wall, BMED; 1♀ GoogleMaps   nymph, same data except 28-VII-1950, ME Gardner, BMED; 1♀ GoogleMaps   nymph, same data except 3-VIII-1952, WJ Wall, BMED GoogleMaps   ; 1♁ nymph, Strawberry Valley , 38.796582N, 120.145187W, 12-VIII- 1912, EC VanDyke, CAS GoogleMaps   ; 1♁ nymph, same data except 5-VIII-1912, EC VanDyke, CAS GoogleMaps   ; 1♁, US50   3.7 mi. W Kyburz, 38.76427N, 120.35897W, 1112 m, 19-VII-2015, JA Cole, DB Weissman, JAC GoogleMaps   sound record; Nevada Co. , 1♁, junction SR20&I-80, 4-X-1972, AM   Shapiro , BMED   ; Placer Co., Cisco , 39.301569N, 120.546874W, VI-1910, C VanGeldern, CAS GoogleMaps   ; 3♁, Emigrant Gap , 39.300456N, 120.668268W, 1567 m, 17-XI-1967, HR Ingham, CSCA; 1♀ GoogleMaps   , Michigan Bluff , 39.042956N, 120.741319W, 1073 m, 11-V-1962, G Buxton, CSCA GoogleMaps   ; Sierra Co., 1♁, 10 mi. S Downieville , 39.41439N, 120.826891W, 28-VII-1962, WJ Turner, CSCA GoogleMaps   ; 1♁, Goodyears Creek , 39.540911N, 120.88824W, 10-VII-1925, EB Nast, CAS GoogleMaps   ; 1♁, St. Charles Hill , 39.56795N, 120.911061W, 7-VII-1925, EB Nast, CAS GoogleMaps   ; Yuba Co., 1♁ nymph, Challenge , 39.487389N, 121.223572W, 1-VII-1963, J Vercamp, CAS GoogleMaps   ; 1♁, same data except 20-VIII-1964, R GoogleMaps   Whitely , CAS; 1♀   , same data except VIII-1963, E Ball Jr, CAS   .


Chicago Academy of Sciences


California Academy of Sciences


Natural History Museum of Los Angeles County


University of Jodhpur


Linnean Society of London


California State Collection of Arthropods


Australian Museum


Departamento de Geologia, Universidad de Chile